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Sept. 4, 1928.

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3 Sheets-Sheet 2 G. D. PITKIN WORKTABLE Original Filed April B, 1926Sept. 4, 1928.

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G. D. PlTKlN WORKTABLE Original Filed April B, 1926 3 Sheets-Sheet 3Patented Sept. 4, 1928.

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My vpresent invention contcnipletes certain improvements in theconstruction of tue work table used in connection with certain types ofstone working machines. as stone sowing or stione polishing inuehines,to the end that the work (stone) muy be more con reniently positionedand more accurately adjusted relative to the sew bhide.r` polishN ingwheel or other Work tool. l

This object, together with certain other features of advantage andsuperiority, which will appear more fully hereinafter, ure secured inthe work table described und illustrated in the accompanyingspecification und drawings, und particularly claimed 1n the appendedclaims.

In the drawings:

Fig. l is u fragmentary side. elevuuon of a Work table and associatedparte in accordance with my invention.

Figs. Z is un end elevation of Fig. 1.

Fig. 3 is e. pien View thereof.

Figs. i and 5 are sections on the hues 4744 und 5-5, respectively, ofFig. 3 und Figs. G und 7 are respectively u plan und au end elevation ofn. modilivation adapted for use with :in extension carriage.

For the purposes of this application, l shell discuss my invention inits adapt-ation to n r tary stone sow, although it is to he understood.that such treatment is purely illustrative und in no way limiting. Insuch s machine, the Work is slowly tresersed loir gitudinnlly beneath arotatingt ser. binde. being automatically reversed at either lunlt ofits travel.

To this end. the stone table, indicated generally at .11. is deturhablymounted on a carriage consistingr of n traine 211 und snpportingr trucks212 and 2li), one of which is grooved und rides ou s V-iopped track railT While the other is list and rides on an ordine y I-rail T. {Figz 2.)

Longitudinal traversing movement is imparted to the table 11 through anysuitable mechanism, as the rack 12 extending longitudinelly of thetable. and engaged by the drivin pinion 13 on cross shaft 14, whichshaft is driven by Worm or otherwise from its meer WeBKTBLE.

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any suitable power source, as for example e reresmg meter;-

e table itseli eonlprises three sections; to wit. two end sections-ands. central section- 'llllie kend ser comprise end slides 215 mounted onWays 216 and laterally sdjusted by individual feed screws .517controlled by hand wheels 218.

The central section of the table consists ot u central slide Q20. Thisslide is movable transversely on Ways 221 by means ot a puir oftransverse feed screws 222 connected to euch other by sproeltets und o.chain 224. The central upper table i220 is provided with u` Circularrecess 22C?. Fig. 5. within which a turn table 4() is mounted. T he turntable 40 has a central hearing 41 on which it can be turned by anysuitable ineens to :my desired position of adjustment und is looked vinsuch position by any suitable lockingr means. 'l'his permits the stoneto be swung on the table, to get the best possible nlinement of its edgeWith the sew Without having to go through the tedious process oi'jacking up and prying over us has been heretofore necessary.

For ext-reine sizes in stone blocks. I provide lateral extensioncomprising' beams 14H 6 und 7) which can be adjusted relative to theframe of the eur supporting the table l1. The ends of the beams L10provide a narrow carriage 141 having n slide 112 udiustable by :i screwisili und hund Wheel 143. The carriage runs on trucks 11M on a thirdrail 'ik which parallels the rails T and T. For ordinary Work Where suchnu extension is not required, this oxtension cnn be detached from themain table us at 146. (See Fig.

lt will thus be seen that 1 provide n. work table in which the severalsections thereof are individually and independently adjustubletransversely relative to each other. and in which one of the sections,here shown us the central section, is provided with a turntable. Theseseveral adjustments. together with the extension arrangement disclosedin Figs. (5 und 7, permit. :L wide range of adjust nient ot' the stonerelative to the saw or other Work tool.

Various modifications in the con-struction and operation of my devicemay obviously be resorted to, if Within the limits of the appendedclaims.

That I therefore claim and desire to secure by Letters Patent is:

1. ln u stone werking machine, a stone table having a pair of enel Ways,:1n end slide in each Way, menne for adjusting; the slides in the ways.und n rent-ral support rotatably mounted between the end supporte.

2. ln a :alone workin@lV muehine, :1 stone table having' e pall' of endways and u` eentml way, :1n encl slide in each enl way, means formovnrLJr the slides in :mill end ways, a ventral Slide, menne foradjusting: the central l lide transversely in said central elirlewny,and :1 ventral support rotatably mounted in said cent1-:1l slide.

3. 1n u stone working machine, a stone table having a pair of end Waysand a central way, an end slide in each end way, means for adjustingSaid 'slides in said end ways, a central slide, und means for edjuetlngrthe central slide transversely in said central slnleway.

4. In u stone workingf machine, a way, a 'ur movable thereon, a stonetable having: a peil' of end ways and a cent1-(11 way, an end Slide ineuch end wry, means` for adjusting the slides` in said end ways, acentral slide in said central slnleway, means for adjustingr said(zentral slide, and u revoluble section set in the Surface 0f saidcentral slide.

In tesi monyv whereof I aflx my signature.

GEORGE D. PITKI N.

